to test your code in local, add <script src='...'></script> before the closing </body> tag in your html file, with the value of src being the cdn link
to test it you can now open the html file with your browser, or use the live server extension to open it from the editor
to submit your code, you need a live version of your code, which can be codepen, repl.it, codesandbox, github pages, anything really as long as there is a live version of your page and the code is publicly viable
First make sure you have a place online like code pen or an online repository like github where your code can be uploaded to. For code pen it’s a biy easy to just create a pen and paste your code in the pen and there are tutorials to help you.
If you didn’t meetup to the requirements it will flag them out if you did it show you a complete score e.g 12/12
Now you can move to the next challenge
Usually no automatic feedback if you want a feedback send your project link to this furum
Just as you have ask this question, this time you include the project link and ask for a feed back you’ll get feed back shortly most times remember to include the online link of your work so people can see your work.
Hope this helps